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3 years ago

Why are the hottest and coldest places on earth over land, not over water?

1 answer:

4 0

Because the heat capacity of water is very high, meaning that it can absorb a big amount of energy (heat) while its temperature increases less than what it does in other bodies that have lower heat capacities.

In terms of equations:

Q α Cp * ΔT => ΔT is inversely related to Cp => if Cp is higher ΔT is lower.

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A total of 54.0 calories of heat are absorbed as 58.3 g of lead is heated from 12.0° C to 42.0° C. What is the specific heat of

Trava [24]

The answer is choice D) 0.031 cal gram degrees celsuis

8 0

2 years ago

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If the intensity level by 15 identical engines in a garage is 100 dB, what is the intensity level generated by each one of these

goblinko [34]

To develop this problem we will apply the concepts related to Sound Intensity. This can be defined as the power carried by sound waves per unit area in a direction perpendicular to that area. Mathematically it can be written as,

$\Delta L = 10log(n)$

$\Delta L$ = Level Difference

n = Number of equal loud sound sources

n = 15

Therefore replacing we have,

$\Delta L = 10 log (n)\\\Delta L = 10 log (15)\\\Delta L = 10*1.176\\\Delta L = 11.76dB$

Therefore over 100dB the total difference intensity level would be

$L_T = L_0 -\Delta L$

Here,

$L_0 = \text{ Total intensity}$

$\L_T = 100 -11.76$

$_T= 88.24dB$

The intensity level generated by one engine is

$L_T = 88.44dB$

8 0

3 years ago

A 0.45 m radius, 500 turn coil is rotated one-fourth of a revolution in 4.01 ms, originally having its plane perpendicular to a

AysviL [449]

Answer:

B = 0.126 T

Explanation:

As per Faraday's law we know that rate of change in magnetic flux will induce EMF in the coil

So here we can say that EMF induced in the coil is given as

$EMF = \frac{\phi_2 - \phi_1}{\Delta t}$

initially the coil area is perpendicular to the magnetic field

and after one fourth rotation of coil the area vector of coil will be turned by 90 degree

so we can say

$\phi_1 = NBAcos 0 = BA$

$\phi_2 = NBAcos 90 = 0$

now we will have

$EMF = \frac{NBA}{t}$

$10,000 V = \frac{(500)(B)(\pi \times 0.45^2)}{4.01\times 10^{-3}}$

$B = 0.126 T$

3 0

2 years ago

A good hypothesis must be which of the following

Aneli [31]

Answer:

Testable

Explanation:

A good hypothesis must always be testable.

4 0

3 years ago

PLZ HELP 30 PNTS AND BRAINLIST IF CORRECT! (accidentally put 10 pnts, i get u the points if u get the answer right)

Rus_ich [418]

Answer:

the net force is acting upon the object. The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude. Hope this helps you.

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3 years ago

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